High-Voltage Accumulator for Vehicles

Abstract

A high-voltage accumulator for vehicles, includes a high-voltage accumulator housing, and at least one accumulator cell which is arranged in the high-voltage accumulator housing and has an emergency degassing opening that opens when a specified accumulator cell internal pressure is exceeded and allows hot gas to exit the interior of the accumulator cell into the interior of the high-voltage accumulator housing. A chamber filled with a phase-changing medium is provided in the region of the emergency degassing opening of the at least one accumulator cell. The chamber is directly or indirectly supplied with hot gas when the hot gas exits the interior of the accumulator cell, whereby heat is input into the phase-changing medium and the phase-changing medium is heated and/or transitions into a high-energy aggregate state.

1 .- 11 . (canceled) 
     
     
         12 . A high-voltage accumulator for a vehicle, comprising:
 a high-voltage accumulator housing;   at least one storage cell, which is arranged in the high-voltage accumulator housing and which has an emergency degassing opening which, in an event of an overshoot of a predefined internal storage cell pressure, opens and permits a venting of hot gas from an interior of the storage cell into an interior space of the high-voltage accumulator housing,   wherein, in a region of the emergency degassing opening of the at least one storage cell, a chamber filled with a phase-changing medium is provided, which chamber, in an event of an escape of hot gas, is acted on indirectly or directly by the hot gas, whereby heat is input into the phase-changing medium, and the phase-changing medium undergoes heat-up and/or transitions to a high-energy aggregate state.   
     
     
         13 . The high-voltage accumulator according to  claim 12 , wherein one of:
 (i) the chamber is arranged on an inner side of a wall of the high-voltage accumulator which faces the interior space of the high-voltage accumulator housing,   (ii) the chamber is arranged on an outer side of the wall of the high-voltage accumulator which is averted from the interior space of the high-voltage accumulator housing, or   (iii) the chamber is integrated in the wall of the high-voltage accumulator housing.   
     
     
         14 . The high-voltage accumulator according to  claim 12 , wherein
 the high-voltage accumulator housing comprises an upper wall, in relation to the direction of gravitational force,   the emergency degassing opening of the at least one storage cell faces the upper wall, and   the chamber is provided on or in the upper wall.   
     
     
         15 . The high-voltage accumulator according to  claim 12 , wherein
 the chamber has a pressure-relief valve which opens when the phase-changing medium exceeds a predefined pressure, wherein phase-changing medium is discharged in the case of the opened pressure-relief valve out of the chamber into the environment.   
     
     
         16 . The high-voltage accumulator according to  claim 15 , wherein
 the chamber and the pressure-relief valve are closed up to a predefined pressure.   
     
     
         17 . The high-voltage accumulator according to  claim 15 , wherein
 an acoustic signal generator is provided in the pressure-relief valve, on the pressure-relief valve, or in a channel between the pressure-relief valve and a discharge opening of the channel into the environment, and   the signal generator generates an acoustic hazard signal by way of the outflux of phase-changing medium into the environment.   
     
     
         18 . The high-voltage accumulator according to  claim 12 , wherein
 the phase-changing medium is at least predominantly composed of water.   
     
     
         19 . The high-voltage accumulator according to  claim 12 , wherein
 the phase-changing medium contains an antifreezing substance, whereby the phase-changing medium is ensured to be in a fluid state at least down to a temperature of −20° C.   
     
     
         20 . The high-voltage accumulator according to  claim 12 , wherein
 a pressure equalization device is provided in one wall of the high-voltage accumulator housing, via which pressure equalization device gas which is located in the interior space of the high-voltage accumulator housing is discharged into the environment and/or via which pressure equalization device ambient air flows into the interior space of the high-voltage accumulator housing.   
     
     
         21 . The high-voltage accumulator according to  claim 20 , wherein
 the pressure equalization device comprises a semi-permeable membrane through which water vapor is discharged from the interior space into the environment, but which prevents any ingress of water from the environment into the interior space.   
     
     
         22 . A vehicle comprising a high-voltage accumulator according to  claim 12 .